/***********************************************************************************
Copy right:	    hqyj Tech.
Author:         jiaoyue
Date:           2023.07.01
Description:    http请求处理
***********************************************************************************/

#include <sys/types.h>
#include <sys/socket.h>
#include "custom_handle.h"
#include "shmem.h"
#include "msg_queue_peer.h"
#include "cJSON.h"

union val_t
{
    int b_val;   // bool类型存储空间
    int i_val;   // 整形值存储空间
    float f_val; // 浮点值存储空间
};
struct std_node
{
    int key;             // 唯一键值
    int type;            // 数据点类型
    int dev_type;        // 数据点属于哪个设备，根据网关支持的设备自行定义
    union val_t old_val; // 变化上报后需要更新旧值
    union val_t new_val; // 从共享内存取出最新数据，放到new_val中
    int ret;             // 默认为-1，采集成功后设置为0，采集失败再置-1
};

#define KB 1024
#define HTML_SIZE (64 * KB)

// 普通的文本回复需要增加html头部
#define HTML_HEAD "Content-Type: text/html\r\n" \
                  "Connection: close\r\n"

static int handle_login(int sock, const char *input)
{
    char reply_buf[HTML_SIZE] = {0};
    char *uname = strstr(input, "username=");
    uname += strlen("username=");
    char *p = strstr(input, "password");
    *(p - 1) = '\0';
    printf("username = %s\n", uname);

    char *passwd = p + strlen("password=");
    printf("passwd = %s\n", passwd);

    if (strcmp(uname, "admin") == 0 && strcmp(passwd, "admin") == 0)
    {
        sprintf(reply_buf, "<script>localStorage.setItem('usr_user_name', '%s');</script>", uname);
        strcat(reply_buf, "<script>window.location.href = '/showInfo.html';</script>");
        send(sock, reply_buf, strlen(reply_buf), 0);
    }
    else
    {
        printf("web login failed\n");

        //"用户名或密码错误"提示，chrome浏览器直接输送utf-8字符流乱码，没有找到太好解决方案，先过渡
        char out[128] = {0xd3, 0xc3, 0xbb, 0xa7, 0xc3, 0xfb, 0xbb, 0xf2, 0xc3, 0xdc, 0xc2, 0xeb, 0xb4, 0xed, 0xce, 0xf3};
        sprintf(reply_buf, "<script charset='gb2312'>alert('%s');</script>", out);
        strcat(reply_buf, "<script>window.location.href = '/login.html';</script>");
        send(sock, reply_buf, strlen(reply_buf), 0);
    }

    return 0;
}

static int handle_add(int sock, const char *input)
{
    int number1, number2;

    // input必须是"data1=1data2=6"类似的格式，注意前端过来的字符串会有双引号
    sscanf(input, "\"data1=%ddata2=%d\"", &number1, &number2);
    printf("num1 = %d\n", number1);

    char reply_buf[HTML_SIZE] = {0};
    printf("num = %d\n", number1 + number2);
    sprintf(reply_buf, "%d", number1 + number2);
    printf("resp = %s\n", reply_buf);

    return 0;
}

static int handle_getData(int sock, const char *input)
{
    struct shm_param p1;
    shm_init(&p1, "shm", 128);
    int *p = shm_getaddr(&p1);
    struct std_node *st = (struct std_node *)(p + 1);
    char reply_buf[HTML_SIZE] = {0};
    for (int i = 0; i < *p; i++)
    {
        char num[16];
        switch (st->type)
        {
        case 1:
            sprintf(num, "%d,", st->new_val.b_val);
            break;
        case 2:
            sprintf(num, "%d,", st->new_val.i_val);
            break;
        case 3:
            sprintf(num, "%.2f,", st->new_val.f_val);
            break;

        default:
            break;
        }
        strcat(reply_buf, num);
        st++;
    }
    send(sock, reply_buf, strlen(reply_buf), 0);

    return 0;
}
static int handle_cmd(int sock, const char *input)
{
    int key, val_n;
    sscanf(input, "id=%d&val=%d", &key, &val_n);
    cJSON *writeroot = cJSON_CreateObject();
    cJSON_AddItemToObject(writeroot, "key", cJSON_CreateNumber(key));
    cJSON_AddItemToObject(writeroot, "val", cJSON_CreateNumber(val_n));
    char *msgPtr = cJSON_Print(writeroot);
    printf("%s\n", msgPtr);
    struct msg m;
    m.type = 32;
    strcpy(m.buf,msgPtr);
    printf("--------------------------%s----------------------%d\n",m.buf,__LINE__);
    msg_queue_send("msg", &m, sizeof(m), 0);
    m.type =502;
    msg_queue_send("msg", &m, sizeof(m), 0);

    return 0;
}

/**
 * @brief 处理自定义请求，在这里添加进程通信
 * @param input
 * @return
 */
int parse_and_process(int sock, const char *query_string, const char *input)
{
    // query_string不一定能用的到

    // 先处理登录操作
    if (strstr(input, "username=") && strstr(input, "password="))
    {
        return handle_login(sock, input);
    }
    // 处理求和请求
    else if (strstr(input, "data1=") && strstr(input, "data2="))
    {
        return handle_add(sock, input);
    }
    else if (strstr(input, "getData"))
    {
        return handle_getData(sock, input);
    }
    else if (strstr(input, "id=") && strstr(input, "val="))
    {
        return handle_cmd(sock, input);
    }

    else // 剩下的都是json请求，这个和协议有关了
    {
        // 构建要回复的JSON数据
        const char *json_response = "{\"message\": \"Hello, client!\"}";

        // 发送HTTP响应给客户端
        send(sock, json_response, strlen(json_response), 0);
    }

    return 0;
}
